linux-kernel - [PATCH 3.2 012/164] staging: panel: fix lcd type

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Message-ID: <lsq.1438473757.980151763@decadent.org.uk>
Date:	Sun, 02 Aug 2015 01:02:37 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org,
	"Sudip Mukherjee" <sudipm.mukherjee@...il.com>,
	"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
	"Sudip Mukherjee" <sudip@...torindia.org>,
	"Willy Tarreau" <w@....eu>
Subject: [PATCH 3.2 012/164] staging: panel: fix lcd type

3.2.70-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Sudip Mukherjee <sudipm.mukherjee@...il.com>

commit 2c20d92dad5db6440cfa88d811b69fd605240ce4 upstream.

the lcd type as defined in the Kconfig is not matching in the code.
as a result the rs, rw and en pins were getting interchanged.
Kconfig defines the value of PANEL_LCD to be 1 if we select custom
configuration but in the code LCD_TYPE_CUSTOM is defined as 5.

my hardware is LCD_TYPE_CUSTOM, but the pins were assigned to it
as pins of LCD_TYPE_OLD, and it was not working.
Now values are corrected with referenece to the values defined in
Kconfig and it is working.
checked on JHD204A lcd with LCD_TYPE_CUSTOM configuration.

Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
Acked-by: Willy Tarreau <w@....eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
[bwh: Backported to 3.2: parameter description was split across two lines]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
--- a/drivers/staging/panel/panel.c
+++ b/drivers/staging/panel/panel.c
@@ -274,11 +274,11 @@ static unsigned char lcd_bits[LCD_PORTS]
  * LCD types
  */
 #define LCD_TYPE_NONE		0
-#define LCD_TYPE_OLD		1
-#define LCD_TYPE_KS0074		2
-#define LCD_TYPE_HANTRONIX	3
-#define LCD_TYPE_NEXCOM		4
-#define LCD_TYPE_CUSTOM		5
+#define LCD_TYPE_CUSTOM		1
+#define LCD_TYPE_OLD		2
+#define LCD_TYPE_KS0074		3
+#define LCD_TYPE_HANTRONIX	4
+#define LCD_TYPE_NEXCOM		5
 
 /*
  * keypad types
@@ -456,8 +456,7 @@ MODULE_PARM_DESC(keypad_enabled, "Deprec
 static int lcd_type = -1;
 module_param(lcd_type, int, 0000);
 MODULE_PARM_DESC(lcd_type,
-		 "LCD type: 0=none, 1=old //, 2=serial ks0074, "
-		 "3=hantronix //, 4=nexcom //, 5=compiled-in");
+		 "LCD type: 0=none, 1=compiled-in, 2=old, 3=serial ks0074, 4=hantronix, 5=nexcom");
 
 static int lcd_proto = -1;
 module_param(lcd_proto, int, 0000);

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